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三角形數
Author:
李春培
三角形數
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
Discover Resources
畢氏定理動畫
Conjugate Diameter—共轭直径
Linear Programming
venn图
六个常见超越函数图像
Discover Topics
Statistics
Interest Calculation
Circumcircle or Circumscribed Circle
Binomial Distribution
Cone